Tension device



Patented July Z9, 1924.

isoazee DANIEL-H-- MURPHY; or wnsr'fnnnrroan, coun-nommer;'Assieuda'monivtnnrcnnf wmuivionu COMPANY, on HARTFORD; ccian-ncmieu'nL A:ciono'nnfrrou ort cou- NECTICUTQ- TENSION DEVICE# Appucauonmeaoctobenia', 192s; sriailn. 668,085:-

Toiallfibhompz'tfmay concern `r Be it known thatL DnNninI-I MURrHif,

a citizen ofthe United-States, residingg-'in WestHartfordfin theVcountvV of Hartford Improvementin Tension` Devices,' ot the followingdescription;j in: connection with the .accompanying drawingsj 1s aspeciication, likev characters, ou the'k drawings representingg;A likeparts'.

This invention .relates to tension .devices l1 for braiding..A machines.

Eachbraid-formingthreadior v filament usedf upon braidingimachines is lusuallyv drawnrom a thread inass-that-is suppprtedl`I 5 by the'y,braidingy mechanism.-A for.; rotationr about a horizontal axis asthefthreadfor filament unwindsr Itis important that tensibn .ben1aintaiiuadl` upon each -braid-formingthread 4or filament throughoutthe. braiding.y operation,v-andfv sionx is shown: as. provided withf.weights-1 V which serve to varythe retardingffe of the tension bar.

It isffound'that the tension*exertedlfuponY Y Y i i Y e shownytovvarid"`they braiding` n point 5.

thefunwinding- -threadfor filamentlby.- theftenFfcreases,.-and.thefpresent? invention,.y therefolfeeA contemplatessimple-'means by; which! a--4V gravity tension bar may` lbecaused-togez'ert a-substantially uniform#tension-.-uponv4 the i 4 K e.lar con-tour and*` is supportedl and rotated by ofi thediameter -of`thezfthread or iilament unwinding tlireador' filament irrespectivelmass` e v Anfimportant 1 feature: fof. the present in Ventron,therefore, f resides mi Va tensionibar that.- rests upon a yarn orthread mass tor4 retardV rotation oit'.v the mass,4 andhhavingl weights-for increasinqthe retard-ing Veiect of the *tension-bar, .and5 in meansyfor succesY sively relieving thefntensionwbar-romf the action of thedifferent `Weights as the diam eter'ofthe thread or ilamentmassdecreases.--.

Thewabove and other` features of-f'the-.=invention will.,be.hereinafterdescribed in con# nection 4with. the. accompanying-@drawingsj whichillustrate agoodypracticalwformthereof.,

the, drawings: l l El v aperspective viewpf part'of a braiding' machineprovided vwith the ten'- K u p p y n n r'siondevice ofthe presentinvention; and vStarte ot Connecticut-,T have invented. an

Eiggf is an. enlarged Side elevation with parj tsgin sectionofa'uthre'ad or filament mass tionlinav,"beiV used `r uponAv'arloustyp'es of braiding machines to"A tension thef threads or.Vila-mentsflofV 'either the outer 4OIT inner threadsupplieSQ, and-itmaybe used to tensifn,thtdead?,4 yarn,` silk; wire or'other formsoifilaments, that mavwbe Vemployed upon braidiiig'imachines,4buthereinafter the term tliiad will: be used in'its-4 broad Vsense todesignate these different kinds' of ilaments.

laas, emp o'yiligthefl tensionl device of.U the present invention has atable'l of circular VVcontour; 'andrising; from the' tableisthefk'edlQcani. plate 2T Mounted centrally ofthetablell is the sleeve ortube` 3' through which fthel braidi 4l j oasses,l and the lower end V'llne braidinof machine shown'l inv part V.in

The tube 3 is supported, fromV a iiXedpar-t of thev machineframe. the-6(and the braid uponileavingfthef tube?) pass upwardly to when@meass'mtfsiown- Y Hthin the circulan table 1 i-svrmountedlthemainrevolvingtramei7 which is4 of` circumountedl' upon -aH-dsuppQrtedby' spindles' lftheendsfof which mayy 'rest rotatably in slots 14'-tormedxin the` upperends of the brackets '1().` -Y Thethread 15issho-wn asextendingyfrom--the source oi"- supplv ll under thebar 161,-andgthroughfthe-i guides 1'7 and 18,5 end then about-a post 19positioned atthe pivot. 'aboutswhich the lever 20 rocks.

shoe 21 that slides in a tortuous slot withinkr the cam plate 2, and thethread passes from the post 19 to a slot 21aV at the opposite end of thelever 20 and then passes to the braiding point. 5. l

The inner Lthread carriers consist of frames 22 that are supported attheir inner ends by the trackway 23 and at their outer ends by shoesthat extend into the slot 24; in the revolving frame 7 and the frames 22travel ina'zdirection opposite to thedirection of travel of the outerlthread carriers ll. l/ilithin the frames 22 are mounted the innerthread' supplies 25 and the thread 26 is led from the supply 25 throughsuitable guides to the braiding point 5.

The construction soV far described forms no part of the presentinvention` and has been shown and brieiiy described to make clear theapplication of the tension device of the t present invention to theouter and inner 'thread' carriers, but y the present tension device iswell adapted yfor use upon various types of braiding machines.

The tension device of the present inven.

tion, in the embodiment shown in Fig. l, consists of a tension bar 27which rests upon thet'upper face of the thread mass l1 or 25 and the barmay be retained in place thereupon by upstanding posts 28. Thearrangement is such that the tension bar 27 exerts a retarding orbraking effect upon the rotating mass as the latter is rotated by theunwinding thread. I

Itmay be desirable to provide means for increasing or decreasing theretarding effect of the tension bar 27 to meet the requirements ofditferent braiding conditions, and this may be accomplished by placingseveral weights upon the bar 27. In Fig. l these weights comprise bars29 which Vmay be similar to the tension bar r27,'while in Figs. 2 and 3the weights are given the form of perforated disks 30. The weightsconveniently are retained in place upon the tension bar 27 by providingthe weights with apertures through which the posts 28 extend, as will beapparent from the drawing, and the retarding effect produced by atension bar may be varied as desired by varying the number of weightsresting upon the bar.

As stated, it is found that the tension exerted upon the unwindingthread by a tension bar increases as the diameter of the thread massdecreases, whereas it is desirable that the'tension upon the threadshould remain substantially constant. The present invention contemplatessimple means by which a substantially uniform tension willv be exertedupon the thread, irrespective of the diameter of the thread mass, and tothis end means is provided for successively relieving the tension bar 27from the action Vposts 28, as will be apparent from Fig. 3,

to thereby relieve the tension bar from the action of the dilferentweights as the diameter of the thread mass decreases.

What isr claimed is:

Vl. In a braiding machine, the combination of a thread mass supportedfor rotation about a horizontal axis to Yunwind the thread, a tensionbar resting upon the thread mass to retard rotation ofthe mass, weightsresting upon the tension bar to increase its retarding effect,- andmeans for relieving the tension bar from the action of the differentweights as the diameter of the thread mass decreases.

2. In a braiding machine, the combination of a thread mass supported forrotation about a horizontal axis, a tension bar resting upon the threadmass to retard rotation of the mass, weights resting upon the tensionbar to increase its retarding effect, and means for arresting at spacedintervals 'the downward movement of the weights to thereby relieve thetension bar from the action of the different weights as the diameter ofthe thread mass decreases.

3. In a device of the class described, the combination of a thread masssupported for rotation about a horizontal aXis, a tension bar restingupon the thread mass to retard rotation of the mass, upwardly extendingguide posts for retaining the tension bar in place upon the thread mass,weights resting upon the tension bar to increase its retarding effectand adapted to be arrested successively in their downward movement bythe posts to thereby relieve the tension bar from the action of thedifferent weights as the diameter of the thread mass decreases.

i. In a braiding machine, the combination of a thread mass supported forrotation about a horizontal axis, a tension bar resting upon the threadmass, upwardly eX- tending guide posts for retaining the tension bar inplace upon the thread mass and decreasing in size in the direction inwhich they extend, weights resting upon the tension bar and havingopenings through which a post extends and adapted to be arrestedsuccessively in their downward move ment by the. increasing size of theposts to thereby relieve the tension bar from the sov ' action of thedifferent weights as the bar moves downwardly.

5. In a device of the class described, the combination of a thread masssupported for rotation about a horizontal axis, a tension bar restingupon the thread mass to retard rotation of the mass, an upwardlyextending guide post which decreases in size in the direction in whichit extends, weights l@ resting upon the tension bar and having openingsthrough which the post extends and adapted to he arrested successivelyin their downward movement by the increasing size of the posts tothereby relieve the ten- Sion har from the action of the differentweights as the bar moves downwardly.

In testimony whereof, I have signed my name to this specification.

DANIEL H. MURPHY.

